GSE Scale Systems - 283
Chapter 32 Remote Display Operation Technical Reference Manual
Cable” after no other transmissions have been received
after the time out period has elapsed.
Disabling Time Out will retain the last received updated
information on its display.
P271.X Formt
This parameter determines the format of the information to
be received. The two formats allowable are Display or
Text.
The “Display format” selection will reflect the identical
information in all segments of its display as on the displays
of the 550, 570 or 574 instruments (P290 in the master unit
must be set for display, “Echo”). This will enable the
master unit to transmit its complete display information to
the remote 450 or 550.
The “Text format” selection will reflect custom
information in the 450 or 550’s display received via its
COMM Port. This mode can be used for receiving custom
information from another GSE instrument but is generally
used for receiving fixed formats from Non-GSE equipment.
Receiving Text format introduction:
The 450 and 550 display has three parts. The main
numeric portion, the upper auxiliary display (5 characters)
and the lower auxiliary display (5 characters).
The data stream received should be in three main parts with
additional start/end control characters. Each piece of data
should be delimited with an ASCII space. The first piece
of data is usually numeric and will be displayed in the 450
or 550’s main display. The second piece of data is
generally the units and is displayed in the 450 or 550’s
upper auxiliary display. The third piece of data
corresponds to the numeric data name and is displayed in
the 450 or 550’s lower auxiliary display. This is the format
a master GSE unit will transmit information when its
configured to transmit its display information.
The following is a demonstration of the format of the
transmission received “Text” by the 450 or 550. This is
how a custom or fixed data stream should appear to be
compatible with 450 remote display operation.
Received Format:
<START CONTROL CHARACTER>
<NUMERIC DATA> < SPACE> <UNITS> <SPACE>
<DATA NAME> <END CONTROL CHARACTER>
Format example:
<STX> <534.03> < > <lb> < > <Gross> <CR>
Start and end control characters are not necessary. All
control characters received are selectable and a “none”
selection for the start or end control character is acceptable.
Other manufacturer’s fixed transmissions might not always
have Start or End control Characters. The spaces between
the numeric data, units and data name are usually present.
The following example shows a common fixed data stream
format. Notice the first set of information is numeric. A
space is between the first piece of data (numeric) and the
units (lb). A space is also present between the units and the
data name (gross). The terminating control code is a
carriage return <CR>.
ie. 456.73 lb gross<CR>
The following information is strictly for setup in the 450
and 550 instruments. This feature will allow the 574 to
transmit custom data to one of many uniquely addressed
remote 450s or 550s.
P272.X Addr
This parameter is only accessable if parameter P271 is set
for Text format. The address parameter allows each 450
or 550 indicator to have its own unique address selection.
The selections are any ASCII character. Scroll through the
selections by pressing <ENTER>. This will allow 450 or
SECTION - 32.5
Figure 49 Cascading the Model 450 (unique address setup)
with a 574.
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